/* SONICRAFT V159 — immersive scroll system inspired by archival / time-capsule interfaces */
:root{
  --ato-ease:cubic-bezier(.22,1,.36,1);
  --ato-fast:.55s;
  --ato-slow:1.05s;
  --ato-accent:#7ce3d8;
  --ato-accent-2:#8b8fff;
  --ato-ink:#f6f7fb;
  --ato-dark:#07101d;
}
html{scroll-behavior:smooth}
body.ato-motion{overflow-x:hidden}
body.ato-motion::selection{background:rgba(124,227,216,.28)}

/* loading transmission — V163, inspired by individually animated portfolio lettering */
.ato-loader{position:fixed;inset:0;z-index:99999;display:grid;place-items:center;background:radial-gradient(circle at 50% 46%,#171a18 0%,#0d0f0e 42%,#070807 100%);color:#f5f1e9;transition:opacity .7s var(--ato-ease),visibility .7s var(--ato-ease);overflow:hidden}
.ato-loader::before{content:"";position:absolute;inset:-26%;background:radial-gradient(circle at 18% 78%,rgba(199,174,121,.16),transparent 27%),radial-gradient(circle at 82% 17%,rgba(124,227,216,.10),transparent 24%),radial-gradient(circle at 52% 50%,rgba(255,255,255,.035),transparent 28%);filter:blur(70px);animation:atoLoaderDrift 6.2s ease-in-out infinite alternate}
.ato-loader::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(200,174,121,.018) 1px,transparent 1px),linear-gradient(90deg,rgba(200,174,121,.018) 1px,transparent 1px);background-size:72px 72px;opacity:.42}
.ato-loader-rings{position:absolute;z-index:1;left:50%;top:48%;width:min(70vw,780px);aspect-ratio:1;border:1px solid rgba(245,241,233,.075);border-radius:50%;transform:translate(-50%,-50%);animation:atoRingBreath 3.8s ease-in-out infinite alternate}
.ato-loader-rings::before,.ato-loader-rings::after{content:"";position:absolute;border-radius:50%;inset:14%;border:1px solid rgba(199,174,121,.09)}
.ato-loader-rings::after{inset:31%;border-color:rgba(124,227,216,.10);animation:atoRingSpin 9s linear infinite}
.ato-loader-box{position:relative;z-index:2;width:min(610px,calc(100% - 48px));padding:28px 28px 24px;text-align:center;background:transparent}
.ato-loader-top{display:flex;justify-content:center;gap:28px;font:7.5px/1.2 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.24em;text-transform:uppercase;color:rgba(245,241,233,.43)}
.ato-loader-top span:last-child{color:#c8ae79}
.ato-loader-title{display:flex;justify-content:center;align-items:flex-end;gap:.12em;margin:26px 0 8px;font-family:"Avenir Next Condensed","Arial Narrow","Noto Sans TC","PingFang TC","Microsoft JhengHei",sans-serif;font-size:clamp(22px,2.8vw,34px);line-height:1;font-weight:520;letter-spacing:.08em;color:#f5f1e9}
.ato-loader-title span{display:inline-block;transform-origin:50% 100%;animation:atoLetterHop 1.42s cubic-bezier(.22,1,.36,1) infinite;animation-delay:var(--ato-letter-delay,0s);text-shadow:0 0 20px rgba(245,241,233,.08)}
.ato-loader-subtitle{display:flex;justify-content:center;flex-wrap:wrap;gap:7px;margin:0 0 12px;font:7.5px/1.2 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.20em;text-transform:uppercase;color:rgba(245,241,233,.46)}
.ato-loader-subtitle span{display:inline-block;animation:atoSubtitleHop 1.7s ease-in-out infinite;animation-delay:var(--ato-sub-delay,0s)}
.ato-loader-wave{position:relative;height:58px;margin:2px auto 0;overflow:hidden;max-width:540px}
.ato-loader-wave svg{display:block;width:100%;height:100%;overflow:visible}
.ato-loader-wave-base{fill:none;stroke:rgba(245,241,233,.10);stroke-width:1.2;vector-effect:non-scaling-stroke}
.ato-loader-wave-ghost{fill:none;stroke:rgba(124,227,216,.18);stroke-width:.85;vector-effect:non-scaling-stroke;stroke-dasharray:4 8;animation:atoWaveFlow 2.8s linear infinite}
.ato-loader-wave-progress{fill:none;stroke:url(#ato-loader-gradient);stroke-width:1.9;stroke-linecap:round;vector-effect:non-scaling-stroke;stroke-dasharray:100;stroke-dashoffset:100;filter:drop-shadow(0 0 8px rgba(200,174,121,.35));transition:stroke-dashoffset .12s linear}
.ato-loader-count{margin-top:-2px;text-align:center;font:8px ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.22em;color:rgba(200,174,121,.82)}
body.ato-loaded .ato-loader{opacity:0;visibility:hidden;pointer-events:none}
@keyframes atoLoaderDrift{to{transform:translate3d(3.5%,-2.5%,0) scale(1.07)}}
@keyframes atoWaveFlow{to{stroke-dashoffset:-48}}
@keyframes atoRingBreath{from{opacity:.48;transform:translate(-50%,-50%) scale(.96)}to{opacity:.82;transform:translate(-50%,-50%) scale(1.025)}}
@keyframes atoRingSpin{to{transform:rotate(-360deg)}}
@keyframes atoLetterHop{0%,100%{transform:translateY(0) scaleY(1);opacity:.74}38%{transform:translateY(-7px) scaleY(1.035);opacity:1}58%{transform:translateY(1px) scaleY(.985);opacity:.9}}
@keyframes atoSubtitleHop{0%,100%{transform:translateY(0);opacity:.38}45%{transform:translateY(-4px);opacity:.82}65%{transform:translateY(1px);opacity:.55}}
@media(max-width:640px){.ato-loader-box{width:min(100% - 32px,520px);padding:22px 10px}.ato-loader-title{font-size:clamp(20px,7vw,28px);gap:.08em}.ato-loader-rings{width:92vw}.ato-loader-wave{height:52px}.ato-loader-top{gap:18px;font-size:6.5px}}
/* fixed atmosphere / grain */
.ato-atmosphere{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden;opacity:.32}
.ato-page-dark .ato-atmosphere{mix-blend-mode:screen}.ato-page-light .ato-atmosphere{mix-blend-mode:multiply;opacity:.16}
.ato-atmosphere::before,.ato-atmosphere::after{content:"";position:absolute;width:48vw;height:48vw;border-radius:50%;filter:blur(90px);will-change:transform;transition:transform .18s linear}
.ato-atmosphere::before{left:-18vw;bottom:-22vw;background:rgba(77,220,203,.20);transform:translate3d(var(--ato-orb-x,0px),var(--ato-orb-y,0px),0)}
.ato-atmosphere::after{right:-18vw;top:-20vw;background:rgba(125,91,255,.20);transform:translate3d(var(--ato-orb-x-neg,0px),var(--ato-orb-y-neg,0px),0)}
.ato-grain{position:fixed;inset:0;z-index:9990;pointer-events:none;opacity:.04;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.7'/%3E%3C/svg%3E");mix-blend-mode:overlay}
body.ato-motion main,body.ato-motion footer,body.ato-motion nav,body.ato-motion header{position:relative;z-index:1}

/* side archive navigation */
.ato-rail{position:fixed;left:10px;top:50%;z-index:9000;transform:translateY(-50%);width:38px;padding:12px 5px;border:1px solid rgba(255,255,255,.09);background:rgba(7,13,23,.28);backdrop-filter:blur(10px);color:#fff;display:flex;flex-direction:column;align-items:center;gap:11px;box-shadow:0 10px 28px rgba(0,0,0,.07);opacity:.72;transition:opacity .3s var(--ato-ease),background .3s var(--ato-ease),border-color .3s var(--ato-ease)}
.ato-rail:hover{opacity:.94;background:rgba(7,13,23,.40)}
.ato-page-light .ato-rail{background:rgba(244,239,231,.48);border-color:rgba(111,105,95,.15);color:#5f5a52;box-shadow:0 10px 28px rgba(60,52,42,.06)}
.ato-page-light .ato-rail:hover{background:rgba(244,239,231,.68)}
.ato-rail-brand{writing-mode:vertical-rl;text-orientation:mixed;font:7px/1.12 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.18em;color:rgba(255,255,255,.45);text-transform:uppercase}
.ato-page-light .ato-rail-brand{color:rgba(75,69,62,.46)}
.ato-rail-line{width:1px;height:24px;background:rgba(255,255,255,.13)}
.ato-page-light .ato-rail-line{background:rgba(75,69,62,.16)}
.ato-rail-nav{display:grid;gap:5px}.ato-rail-btn{appearance:none;border:0;background:transparent;width:18px;height:18px;padding:0;display:grid;place-items:center;color:rgba(255,255,255,.34);font:6px ui-monospace,SFMono-Regular,Consolas,monospace;cursor:pointer;position:relative}
.ato-page-light .ato-rail-btn{color:rgba(75,69,62,.34)}
.ato-rail-btn::before{content:"";position:absolute;width:3px;height:3px;border:1px solid currentColor;border-radius:50%;transition:.35s var(--ato-ease)}
.ato-rail-btn span{opacity:0;transform:translateX(-4px);transition:.35s var(--ato-ease)}
.ato-rail-btn:hover,.ato-rail-btn.active{color:#9be6de}.ato-rail-btn.active::before{width:13px;height:13px;background:rgba(124,227,216,.09);box-shadow:0 0 10px rgba(124,227,216,.20)}
.ato-page-light .ato-rail-btn:hover,.ato-page-light .ato-rail-btn.active{color:#6fbdb4}
.ato-rail-status{writing-mode:vertical-rl;font:6px ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.10em;color:rgba(255,255,255,.44);max-height:96px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ato-page-light .ato-rail-status{color:rgba(75,69,62,.45)}
.ato-progress{position:fixed;right:0;top:0;z-index:9000;width:3px;height:100vh;background:rgba(255,255,255,.06)}.ato-progress-bar{height:0;background:linear-gradient(180deg,#7ce3d8,#8b8fff);box-shadow:0 0 18px rgba(124,227,216,.48);will-change:height}
.ato-scroll-hint{position:fixed;right:19px;bottom:22px;z-index:8990;display:flex;align-items:center;gap:9px;color:rgba(255,255,255,.62);font:8px ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.18em;text-transform:uppercase;mix-blend-mode:difference;transition:opacity .4s}.ato-scroll-hint i{display:block;width:30px;height:1px;background:currentColor;position:relative;overflow:hidden}.ato-scroll-hint i::after{content:"";position:absolute;inset:0;background:#7ce3d8;transform:translateX(-100%);animation:atoScan 2s var(--ato-ease) infinite}@keyframes atoScan{50%,100%{transform:translateX(100%)}}

/* scene framing */
body.ato-motion main>section{position:relative;isolation:isolate;--ato-section-progress:0;--ato-section-y:0px}
body.ato-motion main>section::before{content:attr(data-ato-section);position:absolute;z-index:4;top:20px;right:max(24px,calc((100vw - 1240px)/2));font:8px ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.2em;text-transform:uppercase;color:currentColor;opacity:.24;pointer-events:none}
body.ato-motion main>section::after{content:"";position:absolute;z-index:4;left:0;right:0;top:0;height:1px;background:linear-gradient(90deg,transparent,rgba(130,160,190,.28),transparent);transform:scaleX(calc(.22 + var(--ato-section-progress) * .78));transform-origin:center;pointer-events:none}
.ato-section-heading{will-change:transform,filter,opacity;transform:translate3d(0,var(--ato-section-y),0)}

/* reveal choreography */
body.ato-motion-ready .ato-motion-target{opacity:0;filter:blur(13px);transition:opacity .9s var(--ato-ease) var(--ato-delay,0ms),transform 1.05s var(--ato-ease) var(--ato-delay,0ms),filter .95s var(--ato-ease) var(--ato-delay,0ms),clip-path 1.05s var(--ato-ease) var(--ato-delay,0ms);will-change:opacity,transform,filter,clip-path}
body.ato-motion-ready .ato-motion-target[data-ato-motion="up"]{transform:translate3d(0,72px,0) scale(.985);clip-path:inset(0 0 22% 0)}
body.ato-motion-ready .ato-motion-target[data-ato-motion="left"]{transform:translate3d(-64px,22px,0) rotate(-.8deg);clip-path:inset(0 14% 0 0)}
body.ato-motion-ready .ato-motion-target[data-ato-motion="right"]{transform:translate3d(64px,22px,0) rotate(.8deg);clip-path:inset(0 0 0 14%)}
body.ato-motion-ready .ato-motion-target[data-ato-motion="scale"]{transform:translate3d(0,38px,0) scale(.93);clip-path:inset(7% 7% 7% 7% round 18px)}
body.ato-motion-ready .ato-motion-target.ato-visible{opacity:1;filter:blur(0);transform:none;clip-path:inset(0 0 0 0 round 0)}
body.ato-motion-ready .ato-heading-reveal{opacity:0;transform:translateY(42px);filter:blur(9px);clip-path:inset(0 0 100% 0);transition:opacity .8s var(--ato-ease),transform 1s var(--ato-ease),filter .9s var(--ato-ease),clip-path 1s var(--ato-ease)}
body.ato-motion-ready .ato-heading-reveal.ato-visible{opacity:1;transform:none;filter:none;clip-path:inset(0)}


/* V160 — keep every page's original hero title visible */
body.ato-motion-ready .ato-hero-title,
body.ato-motion-ready .ato-hero-title.reveal,
body.ato-motion-ready .ato-hero-anchor,
body.ato-motion-ready .ato-hero-anchor.reveal,
body.ato-motion-ready .ato-hero-anchor.ato-motion-target{
  opacity:1!important;filter:none!important;transform:none!important;translate:none!important;clip-path:none!important;
}

/* media reveal: image enters like a decoded transmission */
.ato-media-shell{position:relative;overflow:hidden}.ato-media-shell::after{content:"";position:absolute;inset:0;z-index:4;pointer-events:none;background:linear-gradient(180deg,transparent 0%,rgba(124,227,216,.08) 50%,transparent 100%);transform:translateY(-120%);opacity:0}
.ato-media-shell.ato-visible::after{animation:atoDecode 1.35s .12s var(--ato-ease) both}
@keyframes atoDecode{0%{transform:translateY(-120%);opacity:0}20%{opacity:1}100%{transform:translateY(120%);opacity:0}}
.ato-parallax-media{will-change:translate,scale;scale:1.045;transition:filter .55s var(--ato-ease)}
.ato-media-shell:hover .ato-parallax-media{filter:saturate(1.08) contrast(1.03)}

/* subtle loop movement for selected floating elements */
.ato-loop-float{animation:atoFloat 7s ease-in-out infinite alternate}.ato-loop-float:nth-child(even){animation-delay:-3s;animation-duration:9s}
@keyframes atoFloat{from{translate:0 -3px}to{translate:0 7px}}

/* page transition */
.ato-page-wipe{position:fixed;inset:0;z-index:99998;pointer-events:none;background:#07101d;transform:translateY(102%);transition:transform .55s var(--ato-ease)}
body.ato-page-leaving .ato-page-wipe{transform:translateY(0)}

/* Modern scroll-linked enhancement; JS remains the fallback */
@supports(animation-timeline:view()){
  .ato-section-heading{animation:atoHeadingDrift linear both;animation-timeline:view();animation-range:entry 0% exit 100%}
  @keyframes atoHeadingDrift{0%{translate:0 26px}45%{translate:0 0}100%{translate:0 -20px}}
}

@media(max-width:1100px){.ato-rail{display:none}.ato-progress{width:2px}body.ato-motion main>section::before{right:18px}}
@media(max-width:760px){
  .ato-loader-box{padding:18px}.ato-loader-title{font-size:clamp(20px,6.5vw,27px)}.ato-loader-wave{height:52px}.ato-scroll-hint{right:12px;bottom:86px}
  body.ato-motion main>section::before{top:10px;right:12px;font-size:6px;letter-spacing:.14em}
  body.ato-motion-ready .ato-motion-target[data-ato-motion="left"],body.ato-motion-ready .ato-motion-target[data-ato-motion="right"]{transform:translate3d(0,48px,0);clip-path:inset(0 0 16% 0)}
  .ato-atmosphere{opacity:.2}.ato-page-light .ato-atmosphere{opacity:.1}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}.ato-loader{display:none!important}.ato-grain,.ato-atmosphere,.ato-scroll-hint{display:none!important}
  .ato-motion-target,.ato-heading-reveal{opacity:1!important;transform:none!important;filter:none!important;clip-path:none!important;transition:none!important;animation:none!important}
  .ato-loop-float{animation:none!important}.ato-parallax-media{translate:none!important;scale:1!important}
}

/* V172 — zero-flash page handoff */
.ato-loader.ato-loader-force{opacity:1!important;visibility:visible!important;pointer-events:auto!important;transition:none!important}
body.ato-transitioning{overflow:hidden!important}
body.ato-transitioning main,body.ato-transitioning nav,body.ato-transitioning header,body.ato-transitioning footer{pointer-events:none}
body.ato-transitioning .ato-loader{z-index:2147483645}


/* V174 — AI add-on service bridge */
.ai-addon{position:relative;z-index:2;padding:26px 0;background:#090f1b;color:#fff;border-top:1px solid rgba(255,255,255,.07);border-bottom:1px solid rgba(124,227,216,.13);overflow:hidden}
.ai-addon:before{content:"";position:absolute;right:-120px;top:-160px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(124,227,216,.16),rgba(126,113,255,.08) 44%,transparent 72%);filter:blur(14px)}
.ai-addon-inner{position:relative;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:30px;align-items:center;width:min(1180px,calc(100% - 48px));margin:auto}
.ai-addon-copy small{display:block;margin-bottom:7px;font:8px/1.2 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.18em;text-transform:uppercase;color:#89e8de}.ai-addon-copy h2{margin:0 0 7px;font-family:"Noto Serif TC","Songti TC","PMingLiU",serif;font-size:clamp(23px,2.7vw,35px);font-weight:500;line-height:1.2}.ai-addon-copy p{max-width:790px;margin:0;color:rgba(255,255,255,.62);font-size:11.5px;line-height:1.8}.ai-addon-actions{display:flex;gap:9px;flex-wrap:wrap;justify-content:flex-end}.ai-addon-actions a{display:inline-flex;align-items:center;justify-content:center;min-height:41px;padding:0 16px;border-radius:999px;border:1px solid rgba(255,255,255,.2);font-size:10px;font-weight:700;color:#fff}.ai-addon-actions .primary{background:linear-gradient(90deg,#7ce3d8,#8ca8ff);border-color:transparent;color:#08111d}
@media(max-width:780px){.ai-addon{padding:24px 0}.ai-addon-inner{grid-template-columns:1fr;width:min(100% - 32px,680px)}.ai-addon-actions{justify-content:flex-start}}


/* V196 — smooth internal handoff: loader only on first entry, wipe on page-to-page navigation */
.ato-page-wipe{background:#070807!important;transform:translate3d(0,102%,0);transition:transform .36s cubic-bezier(.22,.78,.24,1)!important;will-change:transform;backface-visibility:hidden}
body.ato-page-leaving .ato-page-wipe{transform:translate3d(0,0,0)}
body.ato-page-leaving .ato-loader{opacity:0!important;visibility:hidden!important;pointer-events:none!important}
body.ato-internal-arrival{opacity:0;transition:opacity .34s cubic-bezier(.22,.78,.24,1)}
body.ato-internal-arrival.ato-arrival-visible{opacity:1}
html.ato-prerender,html.ato-booting{background:#070807!important}


/* V197 — full loader on internal navigation without white-frame handoff */
body.ato-transitioning .ato-loader{opacity:1!important;visibility:visible!important;pointer-events:auto!important;transition:opacity .22s ease!important}
body.ato-transitioning .ato-page-wipe{transform:translate3d(0,102%,0)!important}
body.ato-page-leaving .ato-loader{opacity:1!important;visibility:visible!important;pointer-events:auto!important}
html.ato-prerender,html.ato-booting{background:#070807!important}
body.ato-internal-arrival{opacity:1!important}


/* V198 — complete 0→100 loader, then materialized incoming page */
body.ato-internal-arrival > :not(.ato-loader):not(.ato-page-wipe){opacity:0;filter:blur(7px);transform:scale(.992);transition:opacity .62s cubic-bezier(.22,.78,.24,1),filter .62s cubic-bezier(.22,.78,.24,1),transform .62s cubic-bezier(.22,.78,.24,1)}
body.ato-internal-arrival.ato-arrival-visible > :not(.ato-loader):not(.ato-page-wipe){opacity:1;filter:blur(0);transform:scale(1)}
body.ato-internal-arrival .ato-loader{opacity:1!important;visibility:visible!important;pointer-events:auto!important}
body.ato-internal-arrival.ato-arrival-visible .ato-loader{transition:opacity .58s cubic-bezier(.22,.78,.24,1),visibility .58s ease!important}
.ato-loader-wave-progress{transition:none!important}
@media(prefers-reduced-motion:reduce){body.ato-internal-arrival > :not(.ato-loader):not(.ato-page-wipe){filter:none;transform:none;transition:opacity .18s linear}}

/* V223 — remove the circular ring graphic from every loading screen. */
.ato-loader-rings{
  display:none!important;
  opacity:0!important;
  visibility:hidden!important;
  animation:none!important;
}
.ato-loader-rings::before,
.ato-loader-rings::after{
  display:none!important;
  content:none!important;
  animation:none!important;
}